Turret-lathe.



J. C. POTTER.

TURRET LATHE.

APPLICATION FILED JULY 1,1914.

Patented June 4, 1918.

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TURRET LATHE APPLICATION men JULY 1.19m.

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Patented June 4, 1918.

. 2 SHETS-SHEET 2 JAMES C. POTTER, OF PAWTUCKET, RHODE ISLAND.

'IURRET-LATHE.

Specification of Letters Patent.

Patented June 4, 1918.

Application filed July 1, 1914. Serial N 0.. 848,414.

To all whom it may concern:

Be it known that I, JAMES C. POTTER, of Pawtucket, in the county of Providence and in the State of Rhode Island, have invented a certain new and useful Improvement in Turret-Lathes; and do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to machines wherein a series of tools adapted for successive operation are employed, and it is particularly adaptable to screw machines, or turret lathes, and my object is to enable the performance of work of a character which cannot be done by such machines as heretofore constructed, and with this object in view my invention consists in the machine having the construction substantially as hereinafter specified and claimed.

In the accompanying drawings Figure 1 is a view partly in side elevation andpartly in'longitudinal section of enough of a turret lathe to illustrate one embodiment of my invention;

Fig. 2 is a top plan view thereof;

Fig. 3 is a cross section on the line 33 of Fig. 2; a

Fig. 4; is a top plan view showing a different embodiment of my invention.

Generally described my invention comprehends the use of a series of longitudinally slidable tool carriers, and means for reciprocating them in their support, or holder, which preferably is a revolving turret so that one after another each does its allotted operation upon the work carried by a revolving chuck, or holder, and as will be evident, my invention having this general characteristic may be embodied in various forms, or mechanism.

Describing the form of my invention shown in Figs. 1, 2 and 3, there is shown a turret lathe having a bed, or.frame 10 upon the top of which at one end is mounted a work spindle 11, made tubular or hollow for the passage of the stock to be operated upon, and carrying at its inner end a suitable chuck 12, and said bed having on its top near its other end a reciprocating slide 13 which occupies the position of the turret slide in turret lathes. or automatic chucking machine of well known construction and such as forms the subject of patents which have been obtained by me, such as No. 1,115,972, dated Nov. 3rd, 1914:. Said slide, indeed, might be a turret slide carry ing a turret mounted thereon to revolve on a vertical axis, and in the case of the machine shown, while said slide carries a tur ret 13, the latter is not a revolving one. Mounted on the space between the spindle and the slide 13, is a tool-carrying turret 14 mounted to revolve on a horizontal axis, which turret carries a circular series of tool holders 15 in the form of rods or spindles that are slidably mounted in the turret and are normally held yieldingly in a retracted position by a coil spring 16 provided for each tool carrier, each tool carrier in succession being presented to an actuating device, when by the rotation of the turret it alines with the spindle axis by which it is moved against the action of its spring for the performance of work upon the piece carried by the spindle chuck. Obviously the axis of rotation of the turret to one side of the spindle axis to an extent corresponding with the radius of the circle of the series of tool holders. The turret is journaled in bearings in a block or slide 17 mounted upon the machine bed so that it may be adjusted toward and from the spindle chuck, and suitable mechanism, which may be of any desired construction, such for example as the Geneva stop, is provided for rotating the turret step by step and looking it in its successive positions during the reciprocation of a tool carrier I show in Fig. 3, a turret locking and rotating mechanism, which may be used, the locking mechanism consisting of a spring-held bolt 18 which engages detent notches 19 in the periphery of the turret, and the rotating mechanism consisting of a spring-held pawl 20 which is carried by a reciprocating bar 21 and acts upon pins or studs 22 mounted on the turret. The feeding pawl reciprocating bar 21 also carries a spring held pawl 23 which engages a pin or projection on the locking bolt before the feeding pawl engages a turret pin, or stud 22, so as to effect the release of the turret before the feeding pawl begins to turn the turret. The bar 21 is reciprocated by suitable connections with a cam drum mounted on the shaft journaled in the bed of the machine and which receives motion from a suitable source, which connections include a rack 24 on the underside of the bar 21 and a pinion 25 meshing with said rack, the pinion being oscillated from said cam drum. r An important feature of my invention is a graduated traverse of the several tool can riers. Thus, considering the case of drilling holes of small diameter, thetarious toolcarriers Wlll be supplied with slmllar drills and a portion of the hole will be out by thefirst drill, which after making its out will be retracted and the second drill: will take up the work at the point left off by the first and complete its operation of the work and then be retracted and so on through the series of drills, the result being that a hole is drilled'l which has a length many times the length of the travel of one drill.

v iswithdrawinbrings out the chips it cuts and as oil is used. thechips as brought out are washedl'ofl'by the stream of oil so that the drills are thus kept free from chips when they enter the hole and, of course, are well ub ca e The tool holder actuating .device'by which the iieedingmovementofv eachtool' in succession is; producedi consists of a block or plug 26 set. in the non-rotating. turret 27, 'loivn'i l 1ml Whi has h s d 13 isfadvaneed engages a suitable bearing upon the toolcargrier that projects from the tool turret, onthe' side opposite where the tools are lg cgtiqed and preferably said bears'is ad u bl an m'av ns t of a m ll 59 101? sc w n a n h e d d pen- 'in' lie 7 olde h th r w of the successive holders maybe adjusted graduated-dist'ances with referenceto thepoint ifiit ee vel f h lt 13 w ny r engaged theturret plug 24; so that said screws willibe-engaged at points successively nearerv andnearertheir'turret and thus the usS Y 7 Q Wi l en a h i an begin theirp'art ofthe'fwork at points successively farther and fartheralong.

the form of my invention shown in 4 'the'tool' 'carrier actuating device is in the forn 'ofla-rotatable turret 29 mounted on the "reciprocating slide 13, and instead of mountihg the screws, or bolts upon the spindle,-as intheconstruction shown in Figs. 1 to 3,- similar" screws 29 are mounted" to extend radially from theiside of the turret'at gradu ated distances from the turret center and by theirevoliition of said' turret, said screws are brought i succession init'o alinement' with tool carrierwhich is in'position to be opera ed fer-the" mamas of its w connection with the tools fo1"'producing "or a'cting'upon' the hole of a n e eef WQ othe @91 maybe Pr for machining the outer periphery of cylindrical pieces so that the hole operations and; the external operations may be carried on simultaneously. It is also apparent that a cross slide may be provided which will carry forming and cutting oif tools so that themachine can be used tomake .studs and bolts from the bar which is fed through the spindle by customary devices and hence my invention may be embodied in machines for doing the customary work of a regular automatic screw machine. 4

Havingthus described my invention what I claim is-.

1'. In a metal working.machine,the combination of a single work spindle, a series of'tools arranged for successive action upon the same piece of work carried by the spindle, a Carrier for said tools movableto place. the same into and outof position to operate on a piece on the Work spindle, a support for the tools that-is stationary dur ing. the movement of the tools,and means to move the tools. different distances.

' 2. In a metal working machine, the combination ofa single Work spindle, a series of tools arranged'for successive action upon the same piece of work carried by the s indle, a carrier for said tools movable to place the same into andoutof position to operate-on a piece on the work spindle, a support'for the tools that isstationary'during the movement of the tools, and means to move the tools difl'erent distances, consisting of a lide a i g a xed ran o t v a tool carriers having slide engaging. points situated at graduated distances with-reference to the limit of travel of the slide.

3. In a metal working; machine, the combination of 'a single work spindle, a circular series oftool holders for similar tools-arranged for successive 1 action upon the same piece of work carried'by the spindle,,a turret mounted on. an axis ,arallel With that of the W k sp n e. upport g s i toolholders to reciprocate arallel With its axis, said'turretbeingstationary duringthe movement offthe'tb'olsgand means to move the tools diiferentdistances with reference to the work. I I I 4:. In a metal working machine, thecoms bination of a single work spindle, acireular series of'tool holders for similar-tools aran d f r su e ac n p n h aih piece of work-held by the spindle, a" turret mounted on an axis parallel with that] of the work spindle, supportingsaid-tool hold. e t r c pr -e e P l e With its i a d turret being stationary during the movement of the t0,0ls, and arecip'rocathigslide having a fixed rangeof travel, said tool carriers having slide-engaging points situated "at graduated distances with reference to the limit of travel oftheslide. i

. 1 am e 'w r ins ma h ne themm bination of a single Work spindle, a series of similar tools arranged for successive action upon the same piece of Work carried by the spindle, a carrier for said tools movable to place the same into and out of position to operate on a piece on the Work spindle, a support for the tools that is stationary during the movement of the tools, and means to move the tools different distances.

6. In a metal Working machine, the combination of a single Work spindle a series of similar tools arranged for successive action upon the same piece of work carried by the spindle, a carrier for said tools movable to place the same into and out of position to operate on a piece on the work spindle, a support for the tools that is stationary during the movement of the tools, and means to move the tools diiferent distances, consisting of a slide having a fixed range of travel, and tool carriers having slide engaging points situated at graduated distances with reference to the limit of travel of the slide.

In testimony that I claim the foregoing I have hereunto set my hand.

JAMES C. POTTER. Witnesses:

MITCHELL ADAMS, ELVERY LINGARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0. 

